6. Align bolt holes (7) in base of ECU with fold-down panel holes (6).
Mounting hardware is supplied with ECU.
7. Mount ECU (8) to fold-down panel (9) using hardware supplied with ECU. Install IAW TM 5-4120-369-14.
8. Remove four ring bolts from ECU transport location inside shelter and store in Shelter BII Box.
9. Obtain four set screw floor plugs from appropriate storage location and insert into empty ring bolt holes.
10. Repeat these procedures for other ECU.